syzkaller login: [ 31.755463] BUG: Bad rss-counter state mm:00000000bd7f374a type:MM_FILEPAGES val:33 [ 31.757885] BUG: Bad rss-counter state mm:00000000bd7f374a type:MM_ANONPAGES val:22 [ 31.939442] ================================================================== [ 31.940530] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.941602] Read of size 8 at addr ffff88800ed80b38 by task sshd/221 [ 31.942390] [ 31.942613] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.943493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.944552] Call Trace: [ 31.944892] [ 31.945198] dump_stack_lvl+0x91/0xf0 [ 31.945720] print_report+0xcc/0x620 [ 31.946235] ? __virt_addr_valid+0x102/0x340 [ 31.946834] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.947507] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.948186] kasan_report+0xbe/0xf0 [ 31.948695] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.949373] vma_interval_tree_remove+0xc75/0xec0 [ 31.950024] vma_prepare+0xc54/0x11a0 [ 31.950540] __split_vma+0x5af/0x950 [ 31.951047] ? __pfx___split_vma+0x10/0x10 [ 31.951618] ? find_held_lock+0x2c/0x110 [ 31.952189] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.952790] ? lock_is_held_type+0x9f/0x120 [ 31.953367] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.954011] ? mtree_range_walk+0x632/0x900 [ 31.954593] ? mas_walk+0x5c7/0x7c0 [ 31.955097] do_vmi_munmap+0x1f1/0x2b0 [ 31.955634] mmap_region+0x1f9/0x2660 [ 31.956147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.956699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.957457] ? __pfx_lock_acquire+0x10/0x10 [ 31.958029] ? __pfx_mmap_region+0x10/0x10 [ 31.958595] ? security_mmap_addr+0x7d/0xa0 [ 31.959159] ? get_unmapped_area+0x1f5/0x3f0 [ 31.959767] do_mmap+0x854/0xf00 [ 31.960237] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.960750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.961347] ksys_mmap_pgoff+0x3af/0x500 [ 31.961879] do_syscall_64+0x3f/0x90 [ 31.962376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.963041] RIP: 0033:0x7f3e9b519d82 [ 31.963511] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.965720] RSP: 002b:00007ffc1d5f26f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.966631] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e9b519d82 [ 31.967526] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e9a953000 [ 31.968400] RBP: 00007f3e9a953000 R08: 0000000000000009 R09: 0000000000001000 [ 31.969264] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc2cdccb20 [ 31.970120] R13: 00007ffc1d5f2710 R14: 00007ffc1d5f2740 R15: 00007ffc1d5f2aa0 [ 31.970992] [ 31.971293] [ 31.971517] Allocated by task 214: [ 31.971977] kasan_save_stack+0x22/0x50 [ 31.972505] kasan_set_track+0x25/0x30 [ 31.973038] __kasan_slab_alloc+0x59/0x70 [ 31.973575] kmem_cache_alloc+0x16b/0x370 [ 31.974121] vm_area_dup+0x20/0x160 [ 31.974605] __split_vma+0x170/0x950 [ 31.975093] split_vma+0xc6/0x110 [ 31.975558] mprotect_fixup+0x8d2/0xb30 [ 31.976091] do_mprotect_pkey+0x87e/0xd40 [ 31.976636] __x64_sys_mprotect+0x78/0xc0 [ 31.977173] do_syscall_64+0x3f/0x90 [ 31.977652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.978301] [ 31.978525] Freed by task 214: [ 31.978933] kasan_save_stack+0x22/0x50 [ 31.979437] kasan_set_track+0x25/0x30 [ 31.979956] kasan_save_free_info+0x2b/0x50 [ 31.980489] __kasan_slab_free+0x10a/0x190 [ 31.981054] kmem_cache_free+0x10d/0x4d0 [ 31.981570] rcu_core+0x8c8/0x2860 [ 31.982025] __do_softirq+0x1b7/0x7d4 [ 31.982516] [ 31.982735] Last potentially related work creation: [ 31.983336] kasan_save_stack+0x22/0x50 [ 31.983859] __kasan_record_aux_stack+0x8e/0xa0 [ 31.984447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.985098] remove_vma+0x139/0x170 [ 31.985560] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.986139] do_vmi_munmap+0x1f1/0x2b0 [ 31.986638] __vm_munmap+0x138/0x3a0 [ 31.987119] __x64_sys_munmap+0x59/0x80 [ 31.987642] do_syscall_64+0x3f/0x90 [ 31.988132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.988811] [ 31.989035] The buggy address belongs to the object at ffff88800ed80ae0 [ 31.989035] which belongs to the cache vm_area_struct of size 168 [ 31.990531] The buggy address is located 88 bytes inside of [ 31.990531] freed 168-byte region [ffff88800ed80ae0, ffff88800ed80b88) [ 31.991977] [ 31.992199] The buggy address belongs to the physical page: [ 31.992887] page:00000000b768036a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed80 [ 31.993978] memcg:ffff888016aa2f01 [ 31.994408] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.995062] page_type: 0xffffffff() [ 31.995530] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.996477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016aa2f01 [ 31.997398] page dumped because: kasan: bad access detected [ 31.998054] [ 31.998274] Memory state around the buggy address: [ 31.998859] ffff88800ed80a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.999767] ffff88800ed80a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.000669] >ffff88800ed80b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.001526] ^ [ 32.002139] ffff88800ed80b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.002997] ffff88800ed80c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.003879] ================================================================== [ 32.005044] Disabling lock debugging due to kernel taint [ 34.163751] BUG: Bad rss-counter state mm:00000000f4e5cc70 type:MM_FILEPAGES val:33 [ 34.164822] BUG: Bad rss-counter state mm:00000000f4e5cc70 type:MM_ANONPAGES val:22 [ 34.589091] BUG: Bad rss-counter state mm:0000000042f9b74e type:MM_FILEPAGES val:33 [ 34.590337] BUG: Bad rss-counter state mm:0000000042f9b74e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1557' (ECDSA) to the list of known hosts. 2023/06/19 11:42:20 fuzzer started 2023/06/19 11:42:20 dialing manager at localhost:44161 2023/06/19 11:42:20 checking machine... 2023/06/19 11:42:20 checking revisions... [ 35.390922] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:42:21 testing simple program... [ 35.443835] cgroup: Unknown subsys name 'net' [ 35.483104] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:42:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b4f38 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff864b4f3c R9 =ffff888008d7f9b8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=0000000000000015 R15=ffff888008d7f978 RIP=ffffffff81130b17 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00005574c8590000 CR3=000000000e7d2000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=32343a3131203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732030323a3234 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383639 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffea0000619480 RCX=0000000000000000 RDX=ffff888009520000 RSI=ffffffff81660a03 RDI=0000000000000007 RBP=ffff88800952f3a8 RSP=ffff88800952f108 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=0000000000000000 R13=dffffc0000000000 R14=000000000000000c R15=ffffea0000619480 RIP=ffffffff814c0800 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fade4a1dfc0 CR3=000000000e7d2000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2030323a32343a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a32343a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000